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Finding the Fourth Proportional to 90,371.60, 124,639.16 and 63,602.80

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Solution

The fourth proportional to 90,371.60, 124,639.16 and 63,602.80 is: 87,720.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,371.60 : 124,639.16 = 63,602.80 : x
  2. Step 2: Convert to fraction form
    90,371.60/124,639.16 = 63,602.80/x
  3. Step 3: Cross multiply
    90,371.60x = 124,639.16 × 63,602.80
  4. Step 4: Simplify right side
    90,371.60x = 7,927,399,565.65
  5. Step 5: Solve for x
    x = 7,927,399,565.65/90,371.60
  6. Step 6: Final answer
    x = 87,720.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.